Peltigerales is an order of lichen-forming fungi belonging to the class Lecanoromycetes in the division Ascomycota. The taxonomy of the group has seen numerous changes; it was formerly often treated as a suborder of the order Lecanorales. It contains two suborders, eight families and about 45 genera such as Lobaria and Peltigera. The lichens occur worldwide, growing on bark, moss, soil or rocks in humid woodland. The greatest diversity occurs in the Northern Hemisphere although the family Lobariaceae is most diverse in the Southern Hemisphere.